Headband



FIG. 1 is a perspective view of a headband, showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view is identical;

FIG. 3 is a left side view thereof, the right side view is identical;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines in the figures are for the purposes of illustrating portions of the headband, which form no part of the claimed design. 

CLAIM The ornamental design for a headband, as shown and described. 